ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H12As2/c1-5(2)6(3)4/h1-4H3/file?format=sdf&get3d=True  -- InChI=1S/C4H12As2/c1-5(2)6(3)4/h1-4H3 could not be loaded.